<template>
  <el-container class="home-container">
    <!--Header-->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--Body area-->
    <el-container>
      <!--aside-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!--侧边栏菜单区域-->
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#409BFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="(item, i) in menuList" :key="item.id">
            <!--一级菜单的模区域-->
            <template slot="title">
              <!--图标-->
              <i :class="icons[i]"></i>
              <!--文本-->
              <span>{{ item.authName }}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children"
                          :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--Body area on the right-->
      <el-container>
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created () {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      // iconsObj: {
      //   125: 'el-icon-user',
      //   103: 'el-icon-help',
      //   101: 'el-icon-shopping-cart-2',
      //   102: 'el-icon-s-order',
      //   145: 'el-icon-s-data'
      // }
      icons: [
        'icon el-icon-user',
        'icon el-icon-help',
        'icon el-icon-shopping-cart-2',
        'icon el-icon-s-order',
        'icon el-icon-s-data'
      ],
      // 是否折叠
      isCollapse: false,
      // 被激活链接的地址
      activePath: ''
    };
  },
  methods: {
    // 退出
    logout () {
      window.sessionStorage.clear();
      this.$router.push('/login');
    },
    // 获取所有的菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus');
      console.log('左侧菜单列表', res);
      // console.log(await this.$http.get('menus'));
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    // 点击按钮,切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse;
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath);
      this.activePath = activePath;
    }
  }
};
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
.el-main{
  border-color: #EAEDF1;
}
.icon{
  vertical-align: middle;
  margin-right: 5px;
  width: 24px;
  text-align: center;
  font-size: 18px;
  margin-right: 20px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #eeeeee;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;

}
</style>
